ADDENDUM 3APRIL 2011

Specification for Rotary Drill Stem Elements

ANSI/API SPECIFICATION 7-1FIRST EDITION, MARCH 2006EFFECTIVE DATE: SEPTEMBER 2006ADDENDUM 1, MARCH 2007ADDENDUM 2, AUGUST 2009

(EFFECTIVE DATE: FEBRUARY 1, 2010)ADDENDUM 3, APRIL 2011

(EFFECTIVE DATE: OCTOBER 1, 2011)

ISO 10424-1:2004 (Modified), Petroleum and natural gas industries—Rotary drilling equipment—Part 1: Rotary drill stem elements

Addendum 3

Specification for Rotary Drill Stem Elements

Revise current Sub-Clause 5.3 Upper and lower kelly valves – connections - to read as follows:

5.3 Connections

5.3.1 Size and type

All valves covered by this part of ISO 10424, shall be furnished by the manufacturer with end connections for pressure test verification. The preferred end connections on all valves are of the size and style indicated below for the valve type.

Connections stated on the purchase order that are not listed in the tables defined below for each valve type shall be considered as non-preferred (NPC) connections for these applications. Non-preferred connections are not a part of this specification.

Preferred connections on upper kelly valves shall be of the size and type shown in Clause 6, Column 3 of Table 5 (Table A.5) and Table 7 (Table A.7) of this part of ISO 10424.

Preferred upper connections on lower kelly valves shall be of the size and type shown in Clause 6, Column 7 of Table 5 (Table A.5) and Table 7 (Table A.7) of this part of ISO 10424.

Preferred lower connections on lower kelly valves shall be of the size and type of any connection shown in Table 5 (Table A.5), Table 7 (Table A.7), Table 14 (Table A.14) and Table 23 (Table A.23) of this part of ISO 10424 and including the NC 40 and 6 5/8 FH.

Preferred connections on other drill stem safety valves connections shall be of the size and type of any connection shown in Table 5 (Table A.5), Table 7 (Table A.7), Table 14 (Table A.14) and Table 23 (Table A.23) of this part of ISO 10424 and including the NC 40 and 6 5/8 FH.

When connections are machined, the corresponding bevel diameters specified for the connection on the joining product shall be used.

Galling of rotary shouldered connections and sealing shoulders occurs frequently in field usage. Treating the shoulders and threads with a coating of zinc or manganese phosphate has proven to be beneficial in lessening this problem. Therefore a treatment of zinc or manganese phosphate shall be applied to the threads and the sealing shoulders of all end connections of kelly valves and other drill stem safety valves manufactured from standard steels. Application of the treatment shall be after completion of all gauging. The treatment type shall be at the discretion of the manufacturer.

Gall-resistant treatments are not readily available for non-magnetic materials, therefore are not required. Cold working of threads is optional. But purchaser should consider specifying cold working of threads after thread gauging. See 8.1.7.3 for further details.

Consult manufacturer for recommended make-up torques and combined load rating of end connections and any service connections supplied. (See API RP7G Appendix A for combined load rating calculations for API connections.

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2 ADDENDUM 3 TO ANSI/API SPECIFICATION 7-1/ISO 10424-1

5.3.2 Non-destructive testing 5.3.2.1 Coverage

End connections and any service connection shall be subjected to non-destructive examination for both transverse and longitudinal defects. 5.3.2.2 Connections from standard steel

Connections manufactured from standard steel shall be examined by the wet magnetic-particle method. The examination shall be preformed according to a written procedure developed by the manufacturer. The procedure shall be in accordance with ISO 9934-1 or ASTM E 709 and shall be made available to the purchaser on request.

5.3.2.3 Connections from non-magnetic material

Connections manufactured from non-magnetic steel shall be examined by liquid penetrant, using the visible or fluorescent solvent-removable or water-washable method. The examination shall be preformed according to a written procedure developed by the manufacturer. The procedure shall be in accordance with ISO 3452 or ASTM E 1209, ASTM E 1219, ASTM E 1220 and ASTM E 1418 and shall be made available to the purchaser on request.

Revise current Sub-Clause 5.6 Marking to read as follows:

5.6 Marking

Kelly valves and other drill stem safety valves manufactured in accordance with this part of ISO 10424 shall be imprinted using low stress steel stamps or a low-stress milling process as detailed in sub-clauses 5.6.1, 5.6.2 or 5.6.3.

5.6.1 All valves with only preferred end connections

Valves furnished by the valve manufacturer with all connections listed in the tables referenced in sub-clauses 5.3.1.1, 5.3.1.2, 5.3.1.3, 5.3.1.4 or 5.3.1.5 shall be marked with the following information as follows: a) the manufacturer’s name or mark; b) “ISO 10424-1” and/or Spec 7-1; c) date of manufacture (month/year); d) class of service; e) unique serial number;

f) the maximum working pressure, to be applied in a milled recess;

g) the connection size and style, applied on the OD surface adjacent to the connection;

h) an indication of the rotational direction required to position valve in the closed position applied on the OD

surface adjacent to each valve-operating mechanism; i) On class 1 type valves, an indication of normal mud flow direction marked with an arrow (→) and the word

“flow”.